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为研究结构参数对复合材料V型构件固化变形的影响,完成了针对V型构件厚度、拐角半径、拐角角度以及铺层等结构参数的变形影响研究试验。基于剪力滞后理论和弯曲理论利用解析法建立了考虑结构参数影响的复合材料V型构件固化变形预测模型,利用模型预测了V型构件的回弹变形并分析了不同结构参数对V型构件回弹变形的影响机制。结果表明:回弹变形随着厚度的增大而减小,厚度为1~3mm之间,角度回弹变形差异最大在30%左右;回弹变形与拐角角度的补角呈约为0.014的比例;拐角半径的不同导致变形的差异不超过5%;准各向同性铺层试验件展现了最大回弹变形,0°铺层的变形减小了23.5%,90°铺层几乎不发生变形。模型分析结果表明厚度主要通过弯曲刚度和剪切变形两方面影响回弹变形;铺层引起的力学性能和泊松效应的变化是回弹变形有较大区别的主要原因;V型构件直边变形最大为0.20°,对回弹变形影响较大。变形预测结果与试验结果对比验证了解析法模型的准确性。
In order to study the influence of structural parameters on the solidification and deformation of the composite V-shaped members, the deformation and deformation experiments on the V-shaped members’ thickness, corner radius, corner angle and the structural parameters of the ply were completed. Based on the shear lag theory and the bending theory, the prediction model of the solidification deformation of V-shaped composite materials considering the influence of structural parameters is established. The model is used to predict the springback deformation of the V-shaped structure and the influence of different structural parameters on the V- The impact of deformation of the mechanism. The results show that the springback deformation decreases with the increase of the thickness, the thickness is 1 ~ 3mm, and the maximum difference of the angle springback deformation is about 30%. The springback deflection angle with the corner angle is about 0.014 ; The difference of corner radius leads to the difference of deformation not more than 5%; the quasi-isotropic ply test piece shows the maximum rebound deformation, the deformation of 0 ° ply decreases 23.5%, and the 90 ° ply hardly deforms. The results of the model analysis show that the thickness affects the springback deformation mainly through bending stiffness and shear deformation. The mechanical properties caused by the ply and the Poisson effect are the main reasons for the large difference in springback deformation. Is 0.20 °, the impact of springback greater impact. The results of deformation prediction and experimental results verify the accuracy of the analytical model.